Skip to main content
Back to Beauty Index

Haskell vs Gleam

Beautiful 48/60
vs
Handsome 47/60
Overlay radar chart comparing Haskell and Gleam across 6 dimensions Φ Ω Λ Ψ Γ Σ
Haskell
Gleam
Download comparison image

Haskell

The beautifully dressed philosopher who can't find their car keys. Haskell writes the most elegant code in any language, then spends 45 minutes explaining why IO is actually a monad.

Gleam

The new kid who showed up and immediately made the honor roll. Still young — hit 1.0 in 2024 — but already the number-two most admired language. No null, no exceptions, no implicit behavior. Radical simplicity as philosophy.

Haskell scores 48/60 against Gleam's 47/60, leading in 3 of 6 dimensions. Haskell dominates the aesthetic, mathematical, and design axes. Mathematical Elegance is where the pair separates most cleanly — Haskell leads Gleam by 4 points and that gap colours everything else on the page.

See also: Haskell vs PHP , Haskell .

Dimension-by-dimension analysis

Ω Mathematical Elegance

Haskell 10 · Gleam 6

Haskell wins Mathematical Elegance by 4 points — a clear algorithmic edge. The gold standard. fibs = 0 : 1 : zipWith (+) fibs (tail fibs) defines infinity by self-reference. Purity, lazy evaluation, and higher-kinded types let algorithms approach Erdős's "Book" proofs. No other language comes close. The gap on Elegance is real: Haskell rewards precise thought, Gleam rewards precise bookkeeping. Deliberately simple, no higher-kinded types, no advanced abstractions. Gleam trades mathematical power for clarity. The design is intentional, but it limits the ceiling for algorithmic elegance compared to Haskell or OCaml. For high-level work, the gap compounds: fewer lines per algorithm means fewer bugs per feature.

Ψ Practitioner Happiness

Haskell 6 · Gleam 9

Gleam wins Practitioner Happiness by 3 points — an unmistakable experiential gap. Stack Overflow's #2 "Most Admired" at 70%. For a language that hit 1.0 in 2024, the community love is extraordinary. The compiler's error messages are famously friendly. Gleam has done the harder cultural work: tooling that delights, a community that welcomes, documentation that explains. Moderate Stack Overflow admiration (~57%), well below Rust, Elixir, or Gleam. The learning curve is brutal, Cabal/Stack tooling fragmentation has caused years of pain, and cryptic error messages for type-level code create real frustration. The community is passionate but small. Developers admire Haskell more than they enjoy it day-to-day. For high-level work, developer happiness is the main driver of long-term retention.

Γ Organic Habitability

Haskell 6 · Gleam 8

Gleam wins Organic Habitability by 2 points — a real habitability advantage. No null, no exceptions, no implicit behavior means fewer surprises as codebases grow. The radical simplicity is itself a growth-point philosophy, less to go wrong, more room to extend. Where Gleam accommodates change gracefully, Haskell makes you earn each new direction. Purity is a double-edged sword, you can't "just add a side effect here" without restructuring. Changing one type signature can cascade through an entire module. Haskell code is correct but often brittle to modify, which is the opposite of Gabriel's habitability ideal. In high-level work, the language that welcomes modification wins the decade, not the quarter.

Λ Linguistic Clarity

Haskell 8 · Gleam 7

Haskell edges Gleam by a single point on Linguistic Clarity; the practical difference is slim but real. Simple Haskell reads like mathematics rendered in prose. Point-free style and function composition create elegant chains of meaning. Docked from 9 because lens operators (^., .~) and advanced type-level code can be opaque even to intermediate Haskellers. On readability the edge is slim and disappears quickly as idioms are learned. Explicit, predictable, and readable. Every value is named, every path is visible. Not as fluent as Ruby or Elixir in "reads-like-prose" terms, but the absence of magic makes intent self-evident. In high-level work, readable code is the difference between a 6-month onboarding and a 6-week one.

Σ Conceptual Integrity

Haskell 10 · Gleam 9

Haskell edges Gleam by a single point on Conceptual Integrity; the practical difference is slim but real. "Avoid success at all costs." Haskell is about something: purity, types, and mathematical foundations. Every feature follows from a coherent worldview. It's the most internally consistent language design on this list. Both Haskell and Gleam have coherent design philosophies; Haskell merely holds to its centre with a firmer grip. "Radical simplicity." Every feature omission is a deliberate design statement. Louis Pilfold's vision is crystal clear: a language where the right thing is the only thing. Few languages this young have this much conceptual integrity. The winner's philosophical discipline is what keeps its idioms stable as the language evolves.

Φ Aesthetic Geometry

Haskell 8 · Gleam 8

Both score 8 — this is one dimension where Haskell and Gleam genuinely agree. Clean Haskell is visually striking, where clauses, pattern matching, and type signatures create a structured, proportional layout. Docked from 9 because production Haskell with GADTs and monad transformer stacks can produce dense type-signature walls. On geometry the two languages converge; whatever separates them must be found on another axis. Clean syntax with no semicolons, no null, no exceptions. The visual layout is consistent and uncluttered. Gleam code has the proportional clarity of a well-organized document. Designers of high-level code feel this difference the moment they open an unfamiliar module.

Code comparison

Native pattern matching constructs for destructuring and control flow.

Haskell 
describe :: (Show a, Num a, Ord a) => [a] -> String
describe xs = case xs of
  []    -> "empty"
  [x]   -> "singleton: " ++ show x
  [x,y] -> "pair: " ++ show x ++ "," ++ show y
  (x:_) | x > 0     -> "starts positive"
         | otherwise -> "starts non-positive"
Gleam 
pub fn describe(items: List(Int)) -> String {
  case items {
    [] -> "empty"
    [x] -> "singleton"
    [x, ..] if x > 0 -> "starts positive"
    _ -> "other"
  }
}


pub fn unwrap(result: Result(a, b), default: a) -> a {
  case result {
    Ok(value) -> value
    Error(_) -> default
  }
}

For/while iteration patterns and loop constructs.

Haskell 
-- Haskell uses recursion, not loops
factorial :: Integer -> Integer
factorial 0 = 1
factorial n = n * factorial (n - 1)


evens :: [Int] -> [Int]
evens xs = [x | x <- xs, even x]
Gleam 
import gleam/list
import gleam/io


pub fn print_items(items: List(String)) {
  list.each(items, fn(item) { io.println(item) })
}


pub fn sum(items: List(Int)) -> Int {
  list.fold(items, 0, fn(acc, n) { acc + n })
}

The characteristic code snippet that best represents each language.

Haskell 
quicksort :: Ord a => [a] -> [a]
quicksort []     = []
quicksort (x:xs) =
  quicksort smaller ++ [x] ++ quicksort bigger
  where
    smaller = [a | a <- xs, a <= x]
    bigger  = [a | a <- xs, a > x]
Gleam 
pub fn main() {
  "Hello, Joe!"
  |> string.uppercase
  |> io.println
}

Frequently asked questions

Which is easier to learn, Haskell or Gleam?
Gleam scores 9 on Practitioner Happiness versus Haskell's 6. Stack Overflow's #2 "Most Admired" at 70%. For a language that hit 1.0 in 2024, the community love is extraordinary. The compiler's error messages are famously friendly. For classroom or self-directed study, the practitioner-happiness winner almost always has better learning materials and kinder error messages.
Is Haskell or Gleam better for algorithm-heavy code?
For algorithm-heavy code, Haskell has a clear edge — it scores 10/10 on Mathematical Elegance against Gleam's 6/10. The gold standard. fibs = 0 : 1 : zipWith (+) fibs (tail fibs) defines infinity by self-reference. Purity, lazy evaluation, and higher-kinded types let algorithms approach Erdős's "Book" proofs. No other language comes close.
Should I pick Haskell or Gleam in 2026?
Haskell lands in the beautiful tier at 48/60; Gleam in the handsome tier at 47/60. At this score gap the choice turns on context. Evaluate the two against the specific project rather than in the abstract. The score difference reflects years of community use, tooling maturity, and the editorial judgment of the Beauty Index rubric.

Related comparisons

Read the methodology →